BULLETIN NO. 318 PL. XII 
v 80'! 5' 
U.S. GEOLOGICAL SURVEY 
80*30* 
40*15' 
.1120 
} 2580 
1178 
.206 
*2645 
2709 
,110-1 
2706 
40* ob' 
40*oo 
Geology by M.J.Munn 
under th« direction 
M R.Campbell 
Y 2750 
NOTE: The obiect of th*s drawing it to show graphically the amount 
oi variation In the distanoe between the surface beds and the oil sands. 
The smaller numbers, ranging from 34 to 1178, indicate wells repre¬ 
sented on PI. XIII to which reference has been made in the text. The 
larger numDers show the measured distance in feet at these wells between 
the top of the Upper Washington limestone and the top of the Gordon 
sand. The straight lines radiating from these wells are lines on which 
the variations between wells are indicated. The sinuoua lines are sup¬ 
posed to pass through points of equal distance between these beds. 
Wells to which no lines have been drawn are ones that could have been 
used to gmat advantage, had their records been preserved. 
To find the approximate distance to the Gordon sand from any outcrop 
CONVERGENCE SHEET OF CLATSVTELK O VJ)l 
showing distance from tup < >f l 'ppea- Washington aes 
• oil w.-ll n{>*ltajrhftlo 
2805 I)i.sl aiice lit)iu top < >f TTppcir WasL ingUm liiu ' out- 
948 wvil numbers 
of the Upper Washington limestone, first locate the outcrop on Pi. XIM. 
then place this sheet over PI. XIII and note the distance at the located 
point, as indicated by the sinuous linee on this sheet. 
